About the JPG to PDF Converter
What is JPG to PDF conversion?
JPG to PDF conversion takes one or more JPEG images and bundles them into a single PDF document, where each image becomes one page of the PDF. The resulting file opens in any PDF reader and keeps the original image order so the document reads naturally from front to back.
Why combine multiple JPGs into one PDF?
A single PDF is easier to share, print and archive than dozens of loose image files. You can attach one PDF to an email, upload once to a service, print in one batch, or store compactly in the cloud. Sigify's JPG to PDF tool lets you combine as many images as you need into a single document while keeping full control over the page layout.
There is no technical difference — JPG and JPEG are two filename extensions for the same image format defined by the Joint Photographic Experts Group. Windows historically truncated 3-letter extensions, so both names exist in the wild. Sigify accepts both.
Emailing scanned documents in one file, building an album or portfolio, organising receipts, archiving screenshots, printing photo collections, and submitting paperwork that requires a single PDF rather than a folder of images.
Because the entire conversion runs in your browser using JavaScript, your images never leave your device. There is no upload step — Sigify's servers only deliver the tool itself.
"High Quality", "Balanced", and "Smaller File" correspond to JPEG encoder quality of 0.92, 0.82 and 0.60. Higher quality keeps fine detail but produces larger files; smaller file keeps the document compact for quick sharing.
Pick a fixed page size (A4, A3, A5, Letter, Legal) or "Match Image Size" so each page becomes exactly the image's pixel dimension. Orientation can be forced Portrait / Landscape or set to Auto so every image receives the orientation that suits it best.
"Fit to Page" places the image inside the printable area without cropping, "Fill Page" covers the entire page while preserving aspect ratio (parts may be cropped), and "Original Size" uses each image's native pixel dimension scaled to PDF points.
Related Sigify Tools
You can connect the JPG to PDF tool to other Sigify utilities to assemble a complete document workflow without ever leaving your browser: